Green’s Dictionary of Slang

cribbage-peg n.

a leg.

1891		G.R. Sims ‘Tottie’ Dagonet Ditties 127: (She cried, ‘What a Noah’s ark!’), / And right through my ‘rank and riches’ / Did my ‘cribbage-pegs’ assail.
1923		J. Manchon Le Slang.